1、Designation: C1384 12aC1384 17Standard Specification forAdmixtures for Masonry Mortars1This standard is issued under the fixed designation C1384; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number i
2、n parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification pertains to admixtures for masonry mortars. Admixtures are substances other than Specification C270prescribed materials of
3、water, aggregate, and cementitious materials that are used to improve one or more of the recognizeddesirable properties of conventional masonry mortar.1.2 This specification does not cover coloring pigments.NOTE 1Information on coloring pigments can be found in Specification C979.1.3 This specificat
4、ion does not cover additives that are added to the cementitious materials during the manufacture of thecementitious materials.1.4 Acceptance of an admixture is based on its performance in an admixed mortar. Acceptance of the admixed masonry mortaris based on attainment of performance either equivale
5、nt to that required for conventional mortar or improved performance of oneor more indicated properties, while maintaining required performance levels for other properties.1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.NO
6、TE 2The testing laboratory performing the test methods referenced in this specification should be evaluated in accordance with Practice C1093.1.6 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Princi
7、ples for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C91 Specification for Masonry CementC144 Specification for Aggregate for Masonry MortarC150 Spe
8、cification for Portland CementC207 Specification for Hydrated Lime for Masonry PurposesC270 Specification for Mortar for Unit MasonryC305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic ConsistencyC403/C403M Test Method for Time of Setting of Concrete Mixtures by Pen
9、etration ResistanceC595 Specification for Blended Hydraulic CementsC723 Practice for Chemical-Resistant Resin Grouts for Brick or TileC778 Specification for Standard SandC780 Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit MasonryC979 Specificatio
10、n for Pigments for Integrally Colored ConcreteC1072 Test Methods for Measurement of Masonry Flexural Bond StrengthC1093 Practice for Accreditation of Testing Agencies for MasonryC1152/C1152M Test Method for Acid-Soluble Chloride in Mortar and ConcreteC1157 Performance Specification for Hydraulic Cem
11、entC1180 Terminology of Mortar and Grout for Unit Masonry1 This specification is under the jurisdiction of ASTM Committee C12 on Mortars and Grouts for Unit Masonry and is the direct responsibility of Subcommittee C12.03on Specifications for Mortars.Current edition approved Dec. 15, 2012Dec. 1, 2017
12、. Published January 2013January 2018. Originally approved in 1998. Last previous approved in 2012 as editionC1384 12.C1384 12a. DOI: 10.1520/C1384-12A.10.1520/C1384-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual
13、Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be tec
14、hnically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of thi
15、s standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1C1218/C1218M Test Method for Water-Soluble Chloride in Mortar and ConcreteC1329 Specification for Mortar CementC1403 Test Method for Rate of Water Absorption of Masonry Mortars
16、C1437 Test Method for Flow of Hydraulic Cement Mortar3. Terminology3.1 Terminology defined in Terminology C1180 shall apply for this specification.3.2 Definitions of Terms Specific to This Standard:3.2.1 admixed mortar, nmasonry mortar that deviates from those combinations of materials recognized by
17、 Specification C270in that it also contains an admixture.3.2.2 admixture, nsubstance other than the Specification C270 prescribed materials of water, aggregate, and cementitiousmaterials that is added to a masonry mortar to modify one or more properties of the conventional masonry mortar.3.2.3 bond
18、enhancer, nadmixture used to increase the bond strength between the masonry mortar and the masonry unit.3.2.4 reference mortar, nmortar of the same composition as an admixed mortar except that the reference mortar does notinclude the admixture and may contain a different amount of water to obtain an
19、 equivalent flow or penetration as the admixedmortar.3.2.5 set accelerator, nadmixture used to shorten the time of setting of a masonry mortar.3.2.6 set retarder, nadmixture used to lengthen the time of setting of a masonry mortar.3.2.7 water repellent, nadmixture used to decrease the rate of water
20、absorption of the hardened masonry mortar.3.2.8 workability enhancer, nadmixture used in a masonry mortar to increase the ease of being worked and used.3.2.8.1 DiscussionWorkability is a combination of several properties, including: plasticity, consistency, cohesion, adhesion, water retentivity, set
21、tingcharacteristics, and its capacity to remain satisfactory under the influence of masonry unit suction and ambient environmentalconditions. Many of these properties have defied exact laboratory measurement. The mason can best assess workability byobserving the response of the mortar to the trowel
22、and the masonry unit. For further discussion on workability, see the Appendixof Specification C270.4. Classification4.1 Admixtures are classified by their effect on the performance characteristics of conventional masonry mortars. Admixedmortars are classified by their modified properties, as compare
23、d to a reference mortar. The following classifications are recognized:4.1.1 Bond Enhancer.4.1.2 Workability Enhancer.4.1.3 Set Accelerator.4.1.4 Set Retarder.4.1.5 Water Repellent.5. Materials5.1 CementsThe cement used in the evaluation of the admixture shall conform to applicable requirements speci
24、fied in 5.1.1 5.1.5.5.1.1 Cement, PortlandWhen the admixture is evaluated in a mortar containing portland cement, the portland cement shallconform to the requirements for Type I, IA, II, IIA, III, or IIIA of Specification C150.5.1.2 Cement, Blended HydraulicWhen the admixture is evaluated in a morta
25、r containing blended hydraulic cement, theblended hydraulic cement shall conform to the requirements for Type IS, IS-A, IP, IP-A, I(PM) or I(PM)-Aof Specification C595.5.1.3 Cement, HydraulicWhen the admixture is evaluated in a mortar containing a hydraulic cement, the hydraulic cementshall conform
26、to the requirements for Type GU, HE, MS, HS, MH, or LH of Specification C1157.5.1.4 Cement, MasonryWhen the admixture is evaluated in a mortar containing a masonry cement, the masonry cement shallconform to the requirements of Specification C91.5.1.5 Cement, MortarWhen the admixture is evaluated in
27、a mortar containing a mortar cement, the mortar cement shallconform to the requirements of Specification C1329.5.2 LimeWhen the admixture is evaluated in a cement-lime mortar, the hydrated lime shall conform to Specification C207.5.3 SandThe fine aggregate used in the tests will vary dependent on th
28、e test procedure.5.3.1 Sands used for soluble chloride, flexural bond strength and rate of water absorption tests shall be a blend of equal partsby weight of graded standard sand and standard 20-30 sand conforming with Specification C778.C1384 1725.3.2 Sands used for compressive strength, water rete
29、ntion, determination of air content of plastic mortar, board life, and timeof setting tests shall conform to the requirements of Specification C144.6. Chemical Composition6.1 The admixture shall not react adversely with embedded or attached materials common to masonry.NOTE 3Currently, there is no st
30、andard test method for determining the corrosion potential of masonry mortars toward embedded and attachedmaterials. Nonetheless, the admixture shall not be offered for sale if the manufacturer has evidence that the admixture does react adversely with embeddedor attached materials common to masonry.
31、6.2 At the maximum recommended dosage, the mortar admixture shall add not more than 65 ppm (0.0065 %) water-solublechloride, or 90 ppm (0.0090 %) acid-soluble chloride to the mortars overall chloride content as determined by testing of thereference and admixed mortars in accordance with 9.1.1.7. Phy
32、sical Properties7.1 All modified masonry mortars shall comply with the property specification requirements of Specification C270. In addition,the admixed mortars shall conform to all of the specific classification requirements in Table 1 for which the admixture is obtainingqualification. Unless more
33、 specimens are required by a specific test method, a minimum of three specimens shall be tested and theresults averaged. These result averages shall meet the requirements of this section.7.2 Admixture compliance tests shall be the responsibility of the manufacturer of the admixture. These compliance
34、 tests shallbe completed within the past five (5) years and prior to any admixture composition change.8. Mortar Types and Proportions8.1 Design the reference mortar to be a specific type of cement/lime, mortar cement, or masonry cement mortar in conformancewith the proportion specification of Specif
35、ication C270 except that the aggregate ratio shall be fixed at three times the sum of theseparate volumes of cementitious materials. In addition, the aggregate shall meet the requirements in 5.3.TABLE 1 Physical RequirementsABond Enhancer Workability Enhancer Set Accelerator Set Retarder Water Repel
36、lentCompressive strength,min % of reference:7 day 80 80 80 70 8028 day 80 80 80 80 80Water retention, min % ofreference: report 100 report report reportAir content of plasticmortar, % report report report report reportBoard life, min % ofreference report 120 report 120 reportTime of settingB ,allowa
37、ble deviation fromreference, h: min:Initial: at least . . . . . . 1:00 earlier 1:00C later . . .not more than 1:00 earlier nor 1:30later1:00 earlier nor 3:30later3:30 earlier 8:00Clater1:00 earlier nor 1:30laterFinal: at least . . . . . . 1:00 earlier . . . . . .not more than 1:00 earlier nor 1:30la
38、ter1:00 earlier nor 3:30later. . . 8:00Clater1:00 earlier nor 1:30laterFlexural bond strength,min % of reference 110 . . . . . . . . . . . .Rate of water absorptionmax % of reference 24h;28 days . . . . . . . . . . . . 50A The values in the table include allowance for normal variation in test result
39、s. In addition to meeting the requirements in this table, all admixed mortars must meet theproperty requirements of Specification C270.B All time of setting tests shall be performed at 23 3C (73.4 5.4F), except those for set accelerators, which shall be performed at 5 2C (41 3.6F) as specifiedin 9.1
40、.5.C The manufacturers maximum recommended dosage rate shall be used when testing the initial and final set times for a set retarder.C1384 1738.2 The corresponding admixed mortars shall have the same composition as the reference mortars but also shall include theadmixture, and the water content shal
41、l be adjusted to yield the flow or penetration appropriate for each test method. The admixturedosage rate, time of addition, and mixing sequence shall follow the manufacturers recommendations.8.3 A complete set of tests shall be run for all applicable cement/lime, mortar cement, and masonry cement t
42、ypes for which theadmixture is to be qualified.9. Test Methods9.1 For all required tests, test both the reference mortar and the admixed mortar in accordance with the following test methods:9.1.1 Soluble Chloride ContentPrepare six mortar cubes in accordance with the specimen preparation section of
43、Test MethodC1403 including the drying procedure, except that mortar proportions shall be as specified in Section 8 and aggregates shall beas specified in 5.3. After 28 days of age, determine the water-soluble chloride content of three cubes, as percent chloride by massof mortar, in accordance with T
44、est Method C1218/C1218M except increase the sample size to 15 g instead of the 10 g specifiedin Test Method C1218/C1218M. Determine the acid-soluble chloride content of the other three cubes, as percent chloride by massof mortar, in accordance with Test Method C1152/C1152M except increase the sample
45、 size to 15 g instead of the 10 g specifiedin Test Method C1152/C1152M.9.1.2 Compressive StrengthPrepare and test mortar in accordance with Specification C270, except that mortar proportionsshall be as specified in Section 8 and aggregates shall be as specified in 5.3. Test three specimens at 7 days
46、 and three specimensat 28 days.9.1.3 Water RetentionPrepare and test mortar in accordance with Specification C270, except that mortar proportions shall beas specified in Section 8 and aggregates shall be as specified in 5.3.9.1.4 Air Content of Plastic MortarPrepare mortar and determine air content
47、of the plastic mortar in accordance withSpecification C270 except that mortar proportions shall be as specified in Section 8 and aggregates shall be as specified in 5.3.Calculate the air content to the nearest 0.1 % as follows:D 5 W11W21W 31W41W51VW!W1P11W2P2 1W 3P3 1W4P4 1W 5P5 1VW(1)A 51002WM4Dwhe
48、re:D = density of air-free mortar, g/cm3,W1 = weight of portland cement, g,W2 = weight of hydrated lime, g,W3 = weight of mortar cement or masonry cement, g,W4 = weight of sand, g,W5 = weight of mortar admixture, g,Vw = mL of water used,P1 = density of portland cement, g/cm3,P2 = density of hydrated
49、 lime, g/cm3,P3 = density of mortar cement or masonry cement, g/cm3,P4 = density of sand, g/cm3,P5 = density of mortar admixture, g/cm3 ,A = volume of air, %, andWM = weight of 400 mL of mortar, g.9.1.5 Board LifeTest mortar in accordance with Test Method C780, Annex A2 or, alternately, Annex A3, except for themodifications in this section. The mortar proportions shall be as specified in Section 8 and aggregates shall be as specified in 5.3.Prepare the mortar in accordance with the procedures of Test Method C780, modifying those as app
